Biolage Professional Smoothproof Deep Smoothening Hair Serum is designed to tame frizz and smooth rough ends, leaving your hair sleek, shiny, and manageable. Infused with avocado and grape seed oils, this lightweight serum offers long-lasting humidity control and anti-frizz smoothness for up to 72 hours. Perfect for all hair types, including color-treated hair, it deeply nourishes and protects while adding a lustrous shine without weighing your hair down.